I really don't have any problems with my current job. I work security for a few different places, but one of them is an abandoned roofing manufacturing plant, so I don't have to deal with people, which I like.
I guess the worst thing about it is the boredom.
But if I can rant on my previous jobs....whoo boy.
First job I had was a customer service/order taker for Potpurri, Inc. It's company that had 6 different magazines (Potpurri and Expressions were random house items; Stitching and Counted-Cross Stitch, stitching obviously; In the Company of Dogs, dog stuff, ugh; and Back in the Saddle, horse stuff, double ugh).
My biggest hate was Back in the Saddle. For one, I hated taking orders from people on cell phones. One time I took an order from a 13 year old spoiled rich girl using her mommy's cell phone and credit card while her mom was driving through a tunnel. UGH!!!
Oh and some guy once threatened to blow up our warehouse because he thought the item he hadn't received came from there. It didn't, it came from some company in India and the worker's were on strike. I explained this to him many times, but he was too stubborn to listen.
I got called a Schlock once by some Yiddish guy. I thought it was funny until I found out the meaning.
Oh, and don't even get me started on the Navy.